<template>
  <div>
    <van-nav-bar title="标题" left-text="返回" left-arrow @click-left="$router.go(-1)">
      <slot slot="left" name="left"></slot>
      <slot slot="title" name="title"></slot>
      <slot slot="right" name="right"></slot>
    </van-nav-bar>



  </div>
</template>